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50 smoking downhill

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farmuse

04-07-2003 09:09:58




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When the front end is headed downhill and it is setting at iddle it starts to smoke badly and then starts spitting oil. Is the ventalator pump not working properly or is there an oil drain passage blocked. I have just completed a major overhaul new every thing no expense spared but this to me is a problem.




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Clooney

04-07-2003 18:55:04




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 Re: 50 smoking downhill in reply to farmuse, 04-07-2003 09:09:58  
Farmuse, while it could be many things, the vent pump & leaking piston rings come to mind first.
~Try disconnecting the vent pump line running to intake & see if the smoking stops. If that doesn't make a difference you could have a broken oil control ring. ~Does it smoke when coasting down hill & the tractor is back driving the engine? If so suspect a ring problem. ~Make sure the air cleaner isn't overfilled, it could be sucking oil there.
~Look at the spark plugs right after it blows some oil, if both sides are oil covered suspect the vent pump or something else allowing oil to both sides. If only one plug is oil covered suspect a problem on the side that's oil covered. ~If you suspect an oil return problem [that oil would have to get mighty high to enter through the valve guides] try running with the valve cover removed to see if the oil smoke goes away. Usually if it has an oil return problem it will blow smoke all the time & not only with the front pointing down hill.
~Check the oil level, maybe it's overfilled, or there is extra oil entering crankcase. Make sure there isn't any gasoline entering the crankcase from a ruptured diaphragm in the fuel shut-off....

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